Diaphragm disc microporous aerator (aeration tray) is another membrane microporous aeration product. ABS engineering plastics are used for the chassis and supporting plate, the air distribution board is made of ethylene propylene diene monomer (EPDM) material, and the aeration device is composed of aerator, regulator, connector and pipe fittings such as gas distribution pipe, tee, cross, elbow and so on.